Affordable Requirements Ordinance (ARO)

The Affordable Requirements Ordinance (ARO) is the City's inclusionary housing program that requires residential developments with 10 or more units that receive City Council approval for an entitlement, a city land purchase or financial assistance to provide a portion of the units as affordable housing.

First adopted in 2007, the latest revision, updated in April 2021, addresses issues of displacement in neighborhoods seeing rapid development and outlines Community Preservation areas in communities where there is evidence of displacement based on housing market and demographic changes.

The 2021 ARO

The revised ARO was adopted by City Council in April 2021 and will take full effect on Oct. 1, 2021. The 2021 ARO expands off-site options that target Chicagoans in the greatest need for affordable rental housing, while also focusing on anti-displacement measures that allow long-time residents to remain in their communities and benefit from redevelopment. The revised ARO also encourages the production of more affordable and family-sized units, while also maintaining much-needed funding for current programs that support thousands of low-income renters.

Additionally, the revised ARO:

  • Allows off-site units to be built in any part of the city lacking in affordable housing or threatened with displacement
  • Requires that if the triggering development is in a transit-oriented development (TOD) zone the off-site units must also be in a TOD zone
  • Adds mandates and incentives for developers to create deeply affordable and family-sized affordable units
  • Increases accessibility standards and adopt preferential leasing for tenants who need an accessible unit
  • Requires income averaging at 60% and 50% area median income (AMI) tiers to accommodate more low-income earners
  • Adds a 100% AMI tier when matched with subsidies for the lowest-income earners

The 2021 ARO is the result of an 18-month process that began in October 2019 with a public call for applications for an Inclusionary Housing Task Force, which published its report in September 2020. In addition to the task force, DOH solicited input from focus groups, public comment, a City Council subject matter hearing, and months of follow-up meetings with developers and advocates to inform the proposal as introduced.

Income Limits and Long-Term Affordability

For-sale units produced through the ARO must be affordable to households at or below 100 percent of Area Median Income (AMI). Rental units must be affordable to households earning up to 60 percent of AMI.

The maximum monthly rent tables, updated annually, are available for review on DOH's website.

Units built under the ARO are required to remain affordable for a period of 30 years.

See a list of rental properties made available through the ordinance and other city programs. To receive updates on for-sale units as they become available, please contact and ask to be added to the CCLT mailing list.







ARO Ordinance (Section 2-44-085)

ARO Rules 

ARO Rules


Inclusionary Housing Task Force Report


2015 ARO

Residential developments that received City Council approval for a rezoning, city land sale, or financial assistance prior to Oct. 1, 2021 are subject to Chapter 2-44-080
(the 2015 ARO) of the Municipal Code of Chicago if a building permit application for the residential development is submitted prior to Oct. 1, 2025.

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ARO Pilots

Residential developments in the Near North/Near West, Milwaukee Corridor, and Pilsen/Little Village Pilot Areas are subject to Chapters 2-44-090, 2-44-100, and 2-44-105,
respectively,of the Municipal Code of Chicago.

To determine if a project is located within a Pilot area, enter the project address in the ARO Web Form.

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